Question

which of the following values have 4 significant figures? check all that apply.
a. 50.05
b. 36.05
c. 1210
d. 85.3

Explanation:

Step1: Count significant figures for A

Non - zero digits and zeros between non - zero digits are significant. In \(50.05\), the digits \(5\), \(0\), \(0\), \(5\) are significant. So there are \(4\) significant figures.

Step2: Count significant figures for B

In \(36.05\), the digits \(3\), \(6\), \(0\), \(5\) are significant. So there are \(4\) significant figures.

Step3: Count significant figures for C

In \(1210\), trailing zero without a decimal is ambiguous. If written as \(1.21\times10^{3}\) it has \(3\) significant figures. But if it's an exact number (not indicated here), we assume the trailing zero is not significant. So it has \(3\) significant figures.

Step4: Count significant figures for D

In \(85.3\), there are \(3\) significant figures.

Answer:

A. \(50.05\), B. \(36.05\)